love.css

* {
    box-sizing: border-box;
}

body {
    margin: 0px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

header h1 {
    text-align: center;
    font-size: 40px;
    color: white;
}

header {
    padding: 40px;
    background-color:green;
}

nav {
    background-color: #333;
    overflow: hidden;
}

nav a {
    text-decoration: none;
    padding: 20px;
    text-align: center;
    float: left;
    color: white;
}

nav a:hover{
    color: tomato;
}



main {
    background-color: white;
    text-align: center;
}

footer{
    background-color:black;
    padding:20px;

}

footer a{
    color: white;
    padding: 20px;
    text-align: center;
}

footer a:hover{
    color:orange;
}

.class01{
    background-color: aqua;
    padding: 30px
}

img{
    
}